Calculating device



V. DAEMEN.

CALCULATING DEVICE.

APPLICATION FILED FEB. 1, 1922.

1,43 3,186. Patented Oct. 24, 1922.

Patented Oct. 24, 1 922.

- VIK'I'OR DAEMEN, OF FRANKFORT-ON-THE-MAIN, GERMANY.

CALCULATING DEVICE.

Application filed February 1, 1922.

To all whom it may concern:

Serial No. 533,404.

The calculating device shown in Figs. 1

Be it known 't'hathl Vm'ron DAEMEN, a and 2 comprises a cylinder on which a citizen of the German epublic, residing at Schillerstrasse No. 26, Frankfort-on-the- Main, haveinvented new and useful Im provements in 'Ualculating Devices (for which I have filed application for patent in Germany January 23, 1921), of which the following is a specification.

The present invention relates to the well known class of calculating devices comprising two bodies (cylinder and slide, rule and carrier, disks etc.) movable with referand having a de ence to each other, each of said bodies being provided with logarithmical graduations, scales of figures etc. said scales, graduations bein arranged in parallel rows finite relation to each other allowing the performance of calculations (multiplications, division etc).

he main object of the invention is to increase the useful scale bearing portion of the surface of said bodies without increasing the size of said bodies.

I attain this object by shaping the scale bearing portions of the calculating device in such a manner that none of the cooperating parts of the device covers scales or graduations of the other part, therefore the graduations may be arranged close to each other, without intermediate blank space between two consecutive rows of figures graduations etc. The capacity of the calculating device is thereby greatly increased.

With this and other objects in view as will more fully herein after appear, the invention consists in certain novel features of construction and arrangements of arts, hereinafter fully described illustrated 1n the accompanying drawings and particularly pointed out in the appended claim, it being understood that various changes in the form, proportions, size and minor details of construction may be made without departing from the spirit of the invention or sacrificing any of the advantages of the 1nvention.

In the drawing:

Fig. 1 is aside elevation of a logarithmically graduated cylinder with slide;

Fig. 2 is a cross-section on line 2-2 of Fi 1.

igs. 3 to 13 show each a portion of the rim of a hollow cylinder or disk and of the slide cooperating therewith in section illustrating different profiles thereof.

ber of small bars 6 slide y is slidably mounted. is rotatably mounted known manner.

The cylinder :2 in a base in the well The slide comprises a numparallel to each other and to the axis of the cylinder 00 and placed at regular distance apart. The slide 9 is provided with a logarithmic graduation placed on said bars and on the surface of the cylinder two equal graduations are arranged in rows parallel to each other and to the bars. Between two consecutives bars 6 of the slide two rows or sections of the logarithmic raduations of the cylinder are placed.

he bars 6 have rectangular cross-section, they are made as thin as compatible with the handling of calculating device, and are arranged radially with reference to the cylinder and with a narrow edge presented thereto. Both sides of each bar are provided with graduations and the graduations on one bar co-operate with two consecutive sections of the graduation on the cylinder. The scales on the two sides of the bars may be part of one of the same logarithmic graduation or they maybe portions of different graduations. On each face of each bar more than one scale or graduation may be arranged. The ends of the bars are fastened to rings 0 bearing numbers designating the value of the adjacent piece 0 the graduation.

As shown in Figs. 3 and 4 the bars 6 b may be placed at an angle of less than. 90 to the surface a of the cylinder. The bars 6 as shown in Fig. 5 have knife-like crosssection and the bars 6 are bent-off of thin material and they have triangular cross-section.

The surface of the cylinder may have any of the shapes illustrated in Figs. 7 to 11. The surface may be corrugated, fluted, grooved etc. to increase the area on which scales and graduations may be placed. The mantle m and 0, shown in Figs. 7 and 8 consists of thin material, sheet metal, stifi' paper etc. The grooves a of the mantle are shallow, the grooves a being deeper. The scales or graduations on the cylinder may be placed on bars as shown in Fig. 9. In the mantle a grooves are provided in regular distances apart running parallel to each other and to the axis of the cylinder. In each groove a bar 6 is fastened; the portion of each bar projecting from the cylinder is provided with graduation. (lo-operating with the said bars 6 are bars I) of the slide which bars are provided with graduations.

The bars e may be made movable in radial direction in the slots of the cylinder, each may be provided with more than one graduation on each side or face and on the space semicircular cross-section, the graduations being applied to the outer side of the bars e, adjoming the edges thereof. The cross-section of the bars 6 may be made otherwise than shown for instance semi-elliptical etc. In the construction shown in Fign'll the slide is provided with bars I) of triangular cross section, it being understood that the small side adjacent the mantle of the cylinder is very small. The mantle w is provided with ribs 6 the side walls of which are fiat and tapering in such a manner that the faces of the bars I) and those of the ribs 6 may be placed in one plane. Thecfaces of the bars 12 and of the ribs 6 are provided with graduations.

Also diflerent shapes of bars are shown with reference to devices comprising a cylinder, all the different bars, ribs, corrugations etc. may be used in combination with flat disks as shown in Figs. 12 and 13. In. Fig. 12 a flat disk is shown, on which the graduations are arranged in rows parallel to each other and to the bars ofa slide 9 movably arranged in a plane parallel to the disk f. In Fig. 13 the flat disk 7 is rovided with upright bars bearing gra uations on their faces and co-operating with gal; of a slide 9 movable parallel to said Th e mantle of the cylinder a may be provided with slots between two consecutive graduations through which slots light may be thrown from within the cylinder by suitable means (mirrors etc.).

The invention as describedabove may .be applied to rules, round disks etc.

hat I wish to secure by U. S. Letters Patent is a A calculating device comprising a cylinder and a slide movably mounted thereon, bars on said slide set at an ang e to the surface of the cylinder, logarlthmic graduations on both of the faces of each bar, grooves on said cylinder running arallel to the axis of the cylinder, the fiat anks of said grooves and the faces of the said bars of the slide being provided wlth logarithmic graduations bearing a definite relation to each other, the flanks and the faces being so arranged that they may be brought into a common plane.

In witness whereof I aflix my si nature.

VIKTOR DA MEN. Witnesses:

H. R. SOMMERHAFF, G. FLESOH.

arallel to the axis of the slide- 

